I want to update my app. I have a new version of the app and now it says \"Prepare for Submission\".
Now I want to perform \"Prepare for Upload\" but I cannot find t
Look for it here:
Here's the new binary I uploaded:
Then, don't forget to create a new version and then assign the new binary to it (after process is completed):
Just took 19 minutes. If you click the activity tab you can see that the upload is processing.
The reason could also be that you are still releasing binary with the old TestFlight SDK in it.
A few months ago TestFlight updated their service meaning that it is now included in iTunesConnect, previously a TestFlightSDK was included in the project and various codes needed to enable TestFlight for users. This is all now depreciated. This means if you release a new version of an app which still has the TestFlightSDK included your binary won't appear in iTunes Connect and you will receive an email like this:
We have discovered one or more issues with your recent delivery for "blahApp". To process your delivery, the following issues must be corrected:
TestFlight SDK - TestFlight no longer requires an SDK to enable beta testing, crash reporting and analytics. To continue using TestFlight, set up Beta Testing in iTunes Connect and remove references to the SDK from the following executables: blahApp.app/blahApp
Once these issues have been corrected, you can then redeliver the corrected binary.
You need to remove the TestFlightSDK and also all code linked to the old TestFlight. Once this is done the binary should start being picked up by iTunes Connect as the answer above states.
The tricky thing about this issue is that if you're like me the email could go through to your junk, to an old account or if you're working for a client and don't have access to their personal email it is tough to find. Apple give you no other indication that this is what's wrong.
Hope this helps people with this problem going forward
I had the same problem, and waited for more than 8 hours without any result. The plus-icon never showed up under the build section!
Then I saw a new (tax-agreement) contract that I had not signed. I signed it, waited for a few more minutes, and then the plus-icon showed up!
At this time of writing, binary submission should take only few minutes to appear in iTunesConnect. When my binary did not show up for hours, I can immediately tell that something is not right. Most of the answers I found resolved to waiting. This was not the case for me. I went to ask Apple support and I got the answer. My app was missing purpose string for one of my protected data class (for iOS 10 and later). Once I provided the usage description and resubmitted it, the binary shows up right away.
I thought someone else might be facing the same problem. For a complete list of protected data class that requires descriptions, check out this link: https://developer.apple.com/library/content/qa/qa1937/_index.html
It is quite weird but let me show what I have learnt from this new iTunnesConnect layout.
Step 1: You should wait around 10 min to 20 min to see your uploaded binary file in the prerelease section.
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Step 2: After you wait a while (10-20 min) then you would see the below icon
Step 3: Then you could able to see that your binary is ready. 
Step 4: Then click on plus (+) sign, you now could able to choose your binary and then click submit for review button to finalize.
